The earth is in great danger now.We have to do something _______ it.（ ）
A．protectB．protectingC．to protectD．protected
The couple will be away for a while and they need someone the baby．（ ）
A．look afterB．looking after
C．looked afterD．to look after
What do you think of our hotel？
Good! I'm especially satisfied with the high of your service．（ ）
A．levelB．speedC．praiseD．price
I don't know what her hobbies are because we talk about work when we meet．（ ）
A．sometimesB．neverC．alwaysD．seldom
Moon cakes for free to those old people this coming Moon Festival．（ ）
A．were offeredB．will offer
C．have offeredD．will be offered
Shall we get together this Saturday or Sunday evening？
is OK．I'm free this weekend．（ ）
A．BothB．EitherC．NeitherD．None